Asymmetric pipe-plate type bundle pipe reactor and methanol synthesis process

A tube-sheet type, asymmetric technology, applied in chemical instruments and methods, preparation of hydroxyl compounds, preparation of organic compounds, etc., can solve the problems of crowded reactors, low processing costs, and small internal space of the reactors.

Pending Publication Date: 2018-06-15
NANJING JUTUO CHEM TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] There is no strict distinction between large and small reactors. Therefore, whether the heat exchange tubes are grouped or not depends on the specific requirements of each equipment manufacturer and user unit. Since the processing cost of small tube sheets is relatively low, it is important to use them in reactors. Generally, small tube sheets are used as much as possible, but for small reactors, due to the small internal space of the reactor, the use of small tube sheets will make the interior of the reactor more crowded, and the process of manufacturing and subsequent maintenance , which increases the difficulty of installation and maintenance

Method used

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  • Asymmetric pipe-plate type bundle pipe reactor and methanol synthesis process
  • Asymmetric pipe-plate type bundle pipe reactor and methanol synthesis process
  • Asymmetric pipe-plate type bundle pipe reactor and methanol synthesis process

Examples

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Effect test

Embodiment 1

[0032] see figure 1 and figure 2 , an asymmetric tube-sheet bundle tube reactor 100, which includes a shell 10, a plurality of heat exchange tubes 61 are installed in the shell 10, the shell 10 includes a cylindrical cylinder 11, installed in the cylinder 11 The upper head 12 at the upper end of the cylinder and the lower head 13 installed at the lower end of the cylinder. The upper head 12 is provided with a synthesis gas inlet pipe 14 and a steam-water mixture outlet pipe 23 , and the lower head 13 is provided with a synthesis gas outlet pipe 15 and a circulating hot water inlet pipe 33 .

[0033] There is only one first tube-sheet assembly 20 installed at the upper end inside the shell 10 , and three second tube-sheet assemblies 30 are installed at the lower end inside the shell.

[0034]A gas collection pipe 40 and a gas radial distribution cylinder 19 are also installed in the housing 10. The gas collection pipe 40 and the gas radial distribution cylinder 19 extend alo...

Embodiment 2

[0046] A methanol synthesis process, see image 3 , which uses the asymmetric tube-plate bundle reactor in Example 1, feeds the raw material gas 304 at 190-210°C from the synthesis gas inlet pipe 14 into the shell side of the asymmetric tube-plate bundle reactor 100, and performs the synthesis reaction , the mixed gas generated after the reaction is discharged from the synthesis gas outlet pipe 15 and enters the next process.

[0047] The hot water enters the tube side of the asymmetric tube-sheet bundled tube reactor 100 from the circulating hot water inlet pipe 33, absorbs the reaction heat of the raw material gas, and becomes a steam-water mixture, then is discharged from the steam-water mixture outlet pipe 23, and enters the steam drum 200 , the steam-water mixture in the steam drum is flashed, and the steam is released to form steam 202 with a pressure of 4.5 MPa. Driven by the steam pressure in the steam drum, the hot water in the steam drum passes through the hot water ...

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Abstract

The invention discloses an asymmetric pipe-plate type bundle pipe reactor, which comprises a shell. Heat exchange pipes are arranged in the shell; the shell comprises a barrel-shaped barrel; only onefirst pipe-plate assembling unit is arranged on the upper end in the shell; three to six second pipe-plate assembling units are arranged on the lower end in the shell; the first pipe-plate assemblingunit is provided with only one first pipe plate; each second pipe-plate assembling unit comprises a second pipe plate; the upper end of each heat exchange pipe is connected with the first pipe plate;the heat exchange pipes are divided into multiple pipe groups; the lower end of the heat exchange pipe of each pipe group is arranged on one second pipe plate. The invention also discloses a methanolsynthesis process using the bundle pipe reactor. According to the reactor, the heat exchange pipes and the pipe plates are reasonably arranged in a limited space, so that an overhaul space of the reactor is enlarged within an allowable range, and the reactor can be processed and overhauled conveniently.

Description

technical field [0001] The invention specifically relates to an asymmetric tube-plate bundle tube reactor and a methanol synthesis process using the reactor. Background technique [0002] The diameters of chemical reactors vary greatly. The diameter of large reactors can exceed 10 meters, while the diameter of small reactors can be less than 1 meter. In order to maintain the reaction temperature, heat exchange tubes are generally installed in the reactors. In order to remove the heat of reaction from the reactor, in order to facilitate the design, installation and maintenance, the heat exchange system of the reactor generally has only one group, or is divided into several groups. Among them, a small reactor is equipped with a heat exchange group inside the shell, that is, in the A tube sheet is provided at both ends of the casing, and all heat exchange tubes are connected to the two tube sheets. For large-scale reactors, the heat exchange tubes are generally divided into se...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01J8/02C07C29/152C07C31/04
CPCB01J8/0285C07C29/152B01J2208/00132C07C31/04
Inventor 卢健王雪林聂忠峰
Owner NANJING JUTUO CHEM TECH
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